Wow .. 24kW for a clock display !
On Fri, Oct 21, 2016 at 6:56 AM, Todd Caldwell <[email protected]> wrote: > Hi All, > > I've been lurking and assembling gear for the most part, so this is my > first post I think. > > I was at KSC in May of 2010 for the launch of STS-132. Attached is a > relatively closeup pic of the old countdown clock near the press area. As I > recall, the bulbs are 100W incandescent. LOTS of them. > > Sadly, they've replaced it with a HDTV like setup of some kind since. > Video would have been nice I suppose, but the old clock had character. > > Todd - K5SLR. > > > On 10/20/16 04:51, Blair Lade wrote: > >> The KSC clock might just use fluroscent tubes in a 7 segment display >> configuration.Pretty easy to do, just put a set of relay contacts inplace >> of the starter in the circuit, close the contact, fluro turns off, current >> flows through heater / filiment keeping them warm.Open the contact, fluro >> lights..Drive relays off bcd to seven segment decoders, etcWhile it's a bit >> nasty on the fluro tubes when in the off condition, they are cheap..and the >> duty cycle isnt all that bad.In actual practise, the relays suffer more >> than the tubes, and they are cheap too! >> Blair South Australia >> >> >> Sent from Samsung tablet. >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to https://www.febo.com/cgi-bin/m >> ailman/listinfo/time-nuts >> and follow the instructions there. >> >> > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
